Method of and means for closing the ends of the channels of molded hollow channel bricks and building blocks



Y Patented May 31,1932? [UNITESTTES an gorros THOMAS KornL, or wnnsnnsrnm l METHOD yor Ann MEANS ron cLosnvaTHn Enns or THE cnnnnnnsoFI/IOLDED p i HOLLOW cammen Barons Ann nuinnrne encens n y. Application led September 3, 1930, Serial BIOL-479,436, and in YAustriaSeptember 4, 192,9.4

y This invention relatesto a method of clos-y YingV up the open ends of the channelsvof hollow mol-ded bricks or building blocksy andr to adevice for the carrying out of -this method. Arknown method ot accomplishing thedescribed end is/to cleave Vthe ends of the v wallsand/or ofthe ribs between. the channels `Whil'efin the plastic state and -to bend over the aps thus formed into contact with w each other.'` ln hollowbricks and buildingA blocks; with one or more channels closedat nally this knownmethod isv onlysuitable for application in connection with particularly plastic molding material of unusually slight power of adhesion [to tools,e. g. f2() clayandthe'like.

of closingup theopen Vends` ot thechannels of reshl;7 molded hollow bricks and building blocks which Y*consists essentially in the p .formation and uniting of they above-inentioned known flaps of the partitions or ribs between the channels and/or of the walls by means of a combined rubbing and rolling ot n the material of these flaps during the cleav- ,QO Ving and closing process. rlhe cleaving and 'rolling treatment is accomplished by means of rapidly rotating profile rollers which are mounted on a common driven shaft with parallel guiding, and are yfirst Vpressed into the material of the ends of the walls and/or of the ribs or partitions between the channels and then moved at a controllable rate of progress along these partitions. p. y .0 v The cleavageof the walls and/or ribs or Vpartitions in accordance vwith thismethod enables acoinpletely closed arclied bridge toV be formed over' each channel end, since the combination withthe rolling of 'a rubbing or ',SG ferior raw materials which are liabley to modellingy Y y .v c i has 'just left the die-press. Thefpres'ent nvention provides amethod f walls and/or ribs orv finishing action due to the rapid rotation of Y crack for ,the manufacture of kone-sidedly or:

totally closed hollow bricks andV building locks,` v'vithouty danger of a faulty uniting of the cleft portions;`

A suitable form of device lforthe carrying 55.;

out ofthe above-described method` as 1 applied to a multi-channel brick is illustrated by way ot `example inV the accompanying drawings, in which'zf Figi is aside elevationof the device for 6U the carrying out of the method according to the invention, kas seen from the inner side.

Fig. '2 is a section taken on fthelinelI-EI of Fig. :1. Y Y i Fig. 8 illustratesl a detail tion ot the same device, in section; A A i Fig; i Y. illustrates diagrammatically the manipulation of the'device rin connection Y, with a freshly detached molded brick which f 'zo Fig. 5 is a perspective lview in section 'of'` a one-'sidedly closed hollow channel brick.` The device consists of a plate b Vwhichfmay be provided with a handle aV androm which project-arms orbracketsV c to which guides d are attached. Sleeves e ,connected *togethery by meansof a tie-piece f are adapted to be l easily slidable along these guides. V'To the vsleeves e arey attached `the bearings 'g fora vshailt h'which is adapted' to be set in rapid 80 rotation by means, for'example, of a flexible f drive from a suitable driving motor.' n f The shaft 71, is provided at intervals correspending tothe distance betweenthe ribs o'r partitions "J of the hollow brick j with profile l' rollers 7c in front of which is mounted a tem'- plet m with slits Z through" which the rollers are adaptedfto project. The templet; mis provided with a rreturned guiding'edge 7L bent at right angles, and is mounted on bolts lo which are guided kin tubular projections 0 ontheplate f?) under the action ofsprings'g.- In this manner the temple't m,L andthe plate b are renderedcapablefof beingapproached f towards each other up to within a certain Y limitQfor the purpose of pressing thefrollers f 7c through Vtheslits Z' in the templet m whichy is applied to the face of the hollow brick into*k f the yribs or ypartitions of the latter (Fig 4):

rapidly rotating rollers are adapted to i:

of the construc- 65 carry out a forward movement the rate of which depends upon the frictional resistance between the rollers and the material of the ribs or partitions. During this movement 5 the sleeves e together with the shaft ,7L are slid along the guides d, and the material brought in contact with the surface of the rollers is submitted apart from the rolling action to a kind of rubbing or smoothing action which effects the homogeneous uniting of the cleft portions of the ribs or partitions and at the same time prevents the adhesion of the plastic material to the surface of the rollers. The speed of the forward movementA ofV the rollers can be regulated either by means of adjustable springing means inserted between the fixed and the movable parts of the device or, most simply, by means of a thumb latch r as indicated in Fig. 4, in

ggsuch a manner that the forward movement isfnot too rapid, while the rolling action is accomplished at a rate adapted to the nature of the material used.

Under certain circumstances the nature of ggfthe material used can make it desirable to provide a preliminary cutter in the form of a cutting wire in front of the shaping rollers,

so that the material of the ribs or partitions is openedin readiness for the impress ofthe rollers.

As is indicated in'Fig. 4 it is also possible for both end surfaces of the shaped brick lto be treated in the described manner, and also for the whole process of the closing of the as'open ends of the channels to be carried out simultaneously with the removal of the brick from the orifice of the press.

I claim 1. A methody of closing up the open ends of the channels of hollow channel bricks` and building blocks which consists in cleaving the end surfaces of the outside wallsand of the ribs between the said channels, forcing the flaps thus formed apart, and uniting the said flaps across the said open ends by means of rollers adapted to exercise a combined rolling and rubbing action upon the material of the said walls and ribs.

2. Apparatus for closing the open ends of the channels of hollow bricks and building blocks comprisingA adjustable profile rollers arranged to be rotated at a high speed, means for pressing the said rollers into the end surfaces of the ribs of a brick or block, and means ment to the said rollers. f

3. Apparatus for closing the openends of y guide elements carried by the side plate and y arranged on the side thereof opposed to the templet, sleeves slidably mounted on said for imparting a regulatable forward moveguide elements and a revoluble shaft mounted in bearings with which the sleeves are provided, said shaft having profile rollers thereon arranged to be moved by corresponding movement of the side plate through the slots of the templet into engagement with the ribs of the brick or block.

4. Apparatus as claimed in claim 3, in which the side plate is provided with cylinders extending' toward the templet, the latter is provided with plunger elements movable longitudinally in the cylinders and also including springs in the cylinders and bearing against the inner ends of the plunger elements.

5. Apparatus as claimed in claim 3, including means whereby the forward movevment of the rollers incident to their frictional contact with the work may be regulated.

6. Apparatus as claimed inv claim 3, including' means whereby the forward movement of the rollers incident to their frictional contact with the work may be regulated and comprising a thumb latch and in which the side plate is provided with a handle contiguous to the thumb latch.

7. Apparatus as claimed in claim 3, including means for limiting the extent of movement of the side plate toward thetemplet and thereby correspondingly limiting the extent to which the profile rollers may project'through the slots of the templet.

8. Apparatus as claimed in claimy 3, in which the templet is provided at one side with a return end to bear against one side of the brick or block.

In testimony whereof I ailix my signature.

THOMAS KOIDL. 

